Syntax:
BETA( a:Number, b:Number )
Returns the value of the beta function[1] for parameters a and b.
Formula:
One definition of the beta function is
Β(a, b) = Γ(a) ⋅ Γ(b) ∕ Γ(a + b)
This special function is actually evaluated by Fireworkz using the formula
Β(a, b) = EXP( GAMMALN(a) + GAMMALN(b) − GAMMALN(a + b) )
Revisions:
This function was added in 1.30.